Accounts Receivable Days Calculator (DSO)
Assess customer credit collection velocity and cash flow health. Days Sales Outstanding (DSO) calculates the average number of days required to collect payment after a credit sale is completed, highlighting overdue receivables and working capital delays.
Uncollected customer invoice balance from latest balance sheet
Total sales revenue completed on net invoice credit terms
Average days required to collect cash after issuing customer invoice
How to Use This Calculator
- Enter current Accounts Receivable balance from your balance sheet.
- Enter total net annual credit sales (excluding cash or retail point-of-sale transactions).
- Review your DSO score and compare against your agreed contractual payment terms (e.g. Net 30).
- Identify aging overdue accounts to accelerate cash inflow and reduce bad debt write-offs.
Formula & Calculation Methodology
Compares uncollected customer invoice balances against daily credit sales to measure collection velocity.
Worked Example
$85,000 in trade receivables against $680,000 in annual net credit sales
Frequently Asked Questions
What is a typical healthy DSO benchmark?↓
A DSO of 45 days or fewer is standard in most B2B commercial sectors with Net 30 terms. If your payment terms are Net 30, a DSO of 35 to 42 days indicates disciplined customer credit management.
What causes a sudden increase in Days Sales Outstanding (DSO)?↓
Surging DSO indicates lax credit approval standards, disputed invoices due to billing errors or product defects, or customers facing cash crunches delaying vendor payments.
Why must cash sales be excluded from the DSO formula?↓
Cash sales settle immediately at the register with zero credit lag. Including cash sales artificially dilutes the denominator and creates a deceptively low DSO that hides overdue trade receivables.
How can a company systematically reduce its DSO?↓
Companies reduce DSO by issuing electronic invoices immediately upon delivery, offering 2% prompt-payment discounts (2/10 Net 30), requiring upfront deposits, and enforcing credit limits.
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Source Citation & Disclaimer
Informational tool only; not licensed tax, legal, or financial advice.